Bump clean-css from 4.1.9 to 4.1.11 in /example/react (#208)

Bump clean-css from 4.1.9 to 4.1.11 in /example/react

Author: swyxio

example/react/yarn.lock

@@ -2043,8 +2043,9 @@ class-utils@^0.3.5:
     static-extend "^0.1.1"
 
 [email protected]:
-  version "4.1.9"
-  resolved "https://registry.yarnpkg.com/clean-css/-/clean-css-4.1.9.tgz#35cee8ae7687a49b98034f70de00c4edd3826301"
+  version "4.1.11"
+  resolved "https://registry.yarnpkg.com/clean-css/-/clean-css-4.1.11.tgz#2ecdf145aba38f54740f26cefd0ff3e03e125d6a"
+  integrity sha1-Ls3xRaujj1R0DybO/Q/z4D4SXWo=
   dependencies:
     source-map "0.5.x"